A witness who testified against D'Angelo is found murdered; Greggs is briefed on the Barksdale probe.
Detectives' inquiries spark a minor riot, causing a boy to lose an eye and giving police a black eye publicity-wise.
McNulty's detail tries breaking the code on the gang's pagers; Bell teaches D'Angelo how to train lookouts.
Rawls' demands create strange allies; Wallace and D'Angelo wrestle with their consciences; Omar turns witness.
Urban reform forces the Barksdale drug crew to find a new home; the mayor informs Burrell that the number of murders must come down.